Then perhaps the reason it sometimes makes a difference is from some other
effect, like draining the power rail on an old unit that's marginal or
injecting noise into the power rail or some other line. Regardless, it
happens in reality, which means any theories that disagree are simply
missing some
Yeah. Actual "Data Cassettes" that were sold were C10. Just 5 minutes per
side.But again, it doesn't seem logical that a normal recorder made for audio
would be affected by this. I think most decent ones had some sort of speed
control built in.And anyway, this wouldn't be significant when playin
sound on/ sound off is a software function purely. look at the schematic.
On Tue, Jul 20, 2021 at 8:30 PM you got me wrote:
> I have 'seen' SOUND ON/SOUND OFF have an impact on the computer detecting
> an input signal. It does happen, but may be due to degraded components
> (capacitors?) withi
I have 'seen' SOUND ON/SOUND OFF have an impact on the computer detecting an
input signal. It does happen, but may be due to degraded components
(capacitors?) within the input path as the analog signal gets turned into TTL.
From: M100 on behalf of Stephen Adolph
" Yes "sound on" can rob some of the signal and/or make it less distinct,
so the computer has more trouble reading it. "
ah... I disagree. Sound "on" has no impact.
The SID input of the CPU is used solely to detect zero crossings, and that
info is used to toggle the PIO that drives the buzzer.
The only normal bias tapes I have are C60 tapes. I know some of the books I
read on Archive.org say that C20 is the recommended length. Have you had
success with C60 tapes or are these too long?
Thanks for the info. I’ve learned a lot about the cassettes from this
group. I just wish I could get i
>
> Someone mentioned plugging into the "MIC" jack. THAT IS WRONG, you have to
> use the "AUX" , "REM" and "EAR" jacks.
Yes, the service manual (4-7) and the M100 owner's manual (pg 189) both say
to use the AUX input on a cassette recorder.
Mic signals are around 1mv RMS, and line (aux) signals
Regarding the recommendation for using shorter tapes, what I had always been
lead to understand is that the longer tapes put more of a load on the tape
motor, so it can run a bit slower. That was for computer specific data cassette
decks. Not sure if that holds true with a standard deck also.
--
I always used 60 or 90 minute tapes - mostly because that was what I could
get for $1-2 at the local drug store. =)
Tom Wilson
wilso...@gmail.com
(619)940-6311
On Tue, Jul 20, 2021 at 4:40 PM Scott McDonnell
wrote:
> Regarding the recommendation for using shorter tapes, what I had always
> b
This is really good info. Thanks Peter.
—-
Bill Miranda
> On Jul 20, 2021, at 4:44 PM, Peter Noeth wrote:
>
>
> Someone mentioned plugging into the "MIC" jack. THAT IS WRONG, you have to
> use the "AUX" , "REM" and "EAR" jacks. The "MIC" jack is for a microphone
> (Radio Shack just used on
Someone mentioned plugging into the "MIC" jack. THAT IS WRONG, you have to
use the "AUX" , "REM" and "EAR" jacks. The "MIC" jack is for a microphone
(Radio Shack just used one of their standard tape recorders, re-badged for
their computer line) and if you connect the large grey plug there, you will
Yes "sound on" can rob some of the signal and/or make it less distinct,
so the computer has more trouble reading it. That was just for initial
testing to verify that the signal is actually reaching the 100. Once you
have verified that there is nothing obviously wrong with the signal like
it's m
For troubleshooting purposes, load a file from a PC.
If the M100 says "I/O" error it generally means that your signal has been
detected, but is too low.
If the M100 has no response (ie. you DON'T hear a relay clicking) then
generally the signal is too high for the computer to see.
_
Hi Bill --
No the cassette was never that hard to use. I always found it to be
reliable, at least with a fresh tape.
As Brian mentioned you might try saving and loading to a PC. Audacity works
though you have to dial in settings on it too. But with no moving parts and
old tech involved, it reduce
Finally, I was able to get the T102 to say "file found" by manipulating the
volume on the cassette. But, I still couldn't actually load my 4 line
"hello world" BASIC program that I created. Was it really this hard to use
cassette tape back in the day? I have tried recording through the mic jack
The same thing is in the TPDD1 manual too, just at 9600 instead of 19200,
and they don't word it as a suggestion in either one, it is just the
directions full stop.
I think the way to stop thinking it's "wrong" is to realize, simply, these
are not directions for how to operate your com port, they
A few eagle-eyed viewers noticed I used a slightly incorrect configuration
string in the Backpack Quick Start video. This generalized configuration
string was used as it works on the model 100, 102, and 200 and in fact was
suggested in the TANDY TPDD2 manual. But how can it still work if it's
wrong
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